Scientists have been examining the jaws of pufferfish, which over millions of years have evolved special beaks to crack open crab shells and munch on crunchy food.
http://www.dailymail.co.uk/sciencetech/article-2354496/Scientist-believe-humans-grow-beaks-instead-teeth-like-pufferfish.html?ITO=1490&ns_mchannel=rss&ns_campaign=1490
http://www.dailymail.co.uk/sciencetech/article-2354496/Scientist-believe-humans-grow-beaks-instead-teeth-like-pufferfish.html?ITO=1490&ns_mchannel=rss&ns_campaign=1490
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